From KOTA News, it appears that the second largest political party lost something, and now they’re asking for it back:
Officials say fewer than half of the more than 5,000 voters who switched have switched back, only about 2,000 as of this week.
Officials are asking everyone to do so immediately, saying this could severely hurt the Democratic Party by making it significantly harder for its candidates to win this November.
Well, what did they think was going to happen?

Why would someone need to switch their registration back to Democrat in order to vote for Democrats in November?